澳大利亚布朗斯炭质页岩铜镍钴矿工艺矿物学研究

为了确定澳大利亚布朗斯地区炭质页岩铜钴镍矿资源合适的选矿工艺,对该地区有代表性矿样开展了工艺矿物学研究。结果表明:1矿石为典型的沉积型炭质页岩多金属矿,矿物组成复杂,主要金属矿物为黄铜矿、斑铜矿、硫钴镍矿等,矿石中钴、镍等有价元素以类质同象的形式或呈机械夹杂物分布于硫镍钴矿、黄铁矿及脉石矿物中,脉石矿物主要为炭质、白云母、多水高岭石等。2矿石中各矿物间共生关系复杂,普遍存在着交代结构和相互浸染构造,致使部分可浮性较好的炭质矿物易浮选进入硫化矿精矿中,同时部分微细粒硫钴镍矿被黄铜矿包裹,浮选时易进入铜精矿中。3矿石中黄铜矿和黄铁矿属中细粒嵌布范畴,硫镍钴矿属细粒—微粒嵌布范畴。根据矿石工艺矿物学特征,建议采用阶段磨矿—阶段选别的工艺依次回收铜、钴、镍、硫,尾矿可作为钾化肥。

Study on Process Mineralogy of Carbonaceous Shale Copper-Cobalt-Nickel Ore from Browns Area in Australia

Process mineralogy was conducted on a carbonaceous shale copper-cobalt-nickel ore from Browns area in Aus-tralia to confirm appropriate mineral processing technology to synthetically recover its valuable elements. The results show that:①It is a typical sedimentary type carbonaceous shale polymetallic ore,mineral composition is complex,main metal minerals are chalcopyrite,bornite,cobalt-nickel sulfide ore and so on. The valuable elements such as cobalt and nickel are isomorphous or mechanical inclusive in cobalt-nickel sulfide ore,pyrite and gangue minerals. Major gangue minerals are carbon,muscovite and halloysite.②Symbiotic relationship between different minerals are miscellaneous. It was also found widespread metasomatic tex-ture and disseminated structure,which results to good floatability of carbonaceous minerals easily enter to sulfide concentrates, meanwhile,parts of fine cobalt-nickel ores are encapsulated in chalcopyrite,thus they are easy to enter to copper concentrate when floating.③Chalcopyrite and pyrite belongs to the category of fine grained dissemination,sulfur nickel and cobalt is fine-particles embedded category. Based on process mineralogy research results,technical route of stage grinding and stage separa-tion to recover copper,cobalt,nickel successively was recommended,the remaining tailings can as potassium fertilizer.